.box {
    width: 100vw;
    height: 100vh;
    background: #eee;
}

.box-top {
    width: 100vw;
    height: 30vh;
    background: #09f;
}

.box-centent {
    position: fixed;
    top: 260px;
    width: 370px;
    height: 260px;
    background: #fff;
    margin-left: 10px;
    border-radius: 5px;
}

.box-centent .aa {
    padding-left: 120px;
}

.bb {
    float: right;
    color: #eee;
}

.zs {
    font-size: 14px;
    padding-left: 5px;
    color: #eee;
}